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  1. #1
    New Member
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    Mar 2012
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    18
    Location
    San Antonio, NM
    Tractor
    Yanmar YM240D

    Default Yanmar YM240D Injector Pump Removal and Installation

    Hi all,

    Thanks for all the helpful tips on my hydraulic issues in prior post! I have bought a new fuel injector pump for my tractor, thought it was a simple unbolt and slip out job. (WRONG). Does anyone have a step by step removal/installation guide and or some tips. I have the old pump unbolted and the can pull it about an inch out of the side of the engine and can see where the (cable i guess) attaches to the the fuel control lever but it doesn't come far enough out to disconnect. Any help would be greatly appreciated!

  2. #2
    Elite Member
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    Dec 2009
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    2,674
    Location
    gilmer tx
    Tractor
    yanmar 2002d

    Default Re: Yanmar YM240D Injector Pump Removal and Installation

    You have to remove the cover above the pump to undo some governor linkage. Be careful so as not to damage this linkage. I am sending you a pm.

  3. #3
    New Member
    Join Date
    Mar 2012
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    18
    Location
    San Antonio, NM
    Tractor
    Yanmar YM240D

    Default Re: Yanmar YM240D Injector Pump Removal and Installation

    Great, thank you for the help. I sure hope I haven't already caused any more problems for myself by trying to pull the injector pump out...

  4. #4
    New Member
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    Mar 2012
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    18
    Location
    San Antonio, NM
    Tractor
    Yanmar YM240D

    Default Re: Yanmar YM240D Injector Pump Removal and Installation

    Hello everybody,

    Replaced the injector pump, was told that would be the only way that diesel could be getting into my engine oil. Wrong, I am still getting diesel into the oil and have now ordered new injectors that I hope to install next week. What else could it be, does anyone have any ideas?

  5. #5
    Elite Member
    Join Date
    Dec 2009
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    2,674
    Location
    gilmer tx
    Tractor
    yanmar 2002d

    Default Re: Yanmar YM240D Injector Pump Removal and Installation

    Strange occurance. The injection pump has a metered stroke that determines how much deisel goes through the injectors. Almost seems to me you should have a cylinder not firing. I can't imagine any other reason you could flood a cylinder with diesel. Does your engine run smoothly?

  6. #6
    Super Member clemsonfor's Avatar
    Join Date
    Sep 2009
    Posts
    6,336
    Location
    Greenwood Co., SC
    Tractor
    Yanmar YM2000

    Default Re: Yanmar YM240D Injector Pump Removal and Installation

    return lines plumbed into the block? not sure?
    YM2000. MF dirt scoop,4' Jbar bushhog,boompole, LMC 12-16 disk harrow, 4' Atlas boxblade (with rippers). 1980 chevy K10,1990 ford ranger 2wd (285K miles),1997 saturn SL2 (twin cam!!),2001Toyota Higlander
    1986 Cobia 177 sunskiff w/1981 Johnson 60 hp
    1991 Javalen 17ft w/same year 150 Johnson GT
    Troybuilt 4 cycle & Echo 2 stroke,cold natured(need carb rebuild),MS390 Stihl, Northern tool pressure washer, mixes water into the oil in the pump(now dead, motor on a tiller). 5000 watt generator.

  7. #7
    New Member
    Join Date
    Mar 2012
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    18
    Location
    San Antonio, NM
    Tractor
    Yanmar YM240D

    Default Re: Yanmar YM240D Injector Pump Removal and Installation

    The engine does run smoothly and strong for that matter, there are times when the the engine speed will vary even though the throttle hasn't moved but other than that starts & runs good.

  8. #8
    New Member
    Join Date
    Mar 2012
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    18
    Location
    San Antonio, NM
    Tractor
    Yanmar YM240D

    Default Re: Yanmar YM240D Injector Pump Removal and Installation

    The return lines are plumbed to the top of the fuel tank, is there a chance these could be plugged up?

  9. #9
    Elite Member
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    Dec 2009
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    2,674
    Location
    gilmer tx
    Tractor
    yanmar 2002d

    Default Re: Yanmar YM240D Injector Pump Removal and Installation

    Quote Originally Posted by brads522 View Post
    The return lines are plumbed to the top of the fuel tank, is there a chance these could be plugged up?
    Highly unlikely. Fuel leaves the injectors in the 3000psi range so if one is leaking by I don't think the little return line will hold it.

  10. #10
    New Member
    Join Date
    Mar 2012
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    18
    Location
    San Antonio, NM
    Tractor
    Yanmar YM240D

    Default Re: Yanmar YM240D Injector Pump Removal and Installation

    I have ordered new injectors and plan to install them later this week. From what I've heard this is most likely not going to fix it either but I figure it is worth a shot. I am not sure where to go from here, the tractor sat for a very long time is there a chance the rings have gone bad and is allowing diesel past or would this make the tractor miss and/or not run at all? I sure hope not, I don't have the time or $$ for something like that at this juncture...

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